Fix OpenGL 2.0 fallback shader for Layer View
Fix OpenGL 2.0 fallback shader for Layer View

Curahelper/Cura,fieldOfView/Cura,hmflash/Cura,ynotstartups/Wanhao,fieldOfView/Cura,ynotstartups/Wanhao,Curahelper/Cura,hmflash/Cura